<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item of hot"
               :key="item.id"
               @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
           v-for="(item,key) of cities"
           :key="key"
           :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom"
               v-for="innerItem of item"
               :key="innerItem.id"
               @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import { mapState,mapMutations } from 'vuex'
  export default {
    name: 'CityList',
    props:{
      hot:Array,
      cities:Object,
      letter:String,
    },
    computed:{
      ...mapState({
        currentCity:'city'
      })
    },
    methods:{
      handleCityClick(city){
        this.changeCity(city)
        this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
    },
    mounted () {
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    watch:{
      letter (){
        if(this.letter){
          const element =this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    }
  }
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color :#ccc
    &:after
      border-color :#ccc
  .border-bottom
  &:before
    border-color :#ccc
  .list
    overflow:hidden
    position :absolute
    top: 1.58rem
    left :0
    right :0
    bottom :0
    .title
      line-height :.54rem
      background :#eee
      padding-left :.2rem
      color :#666
      font-size :.26rem
    .button-list
      overflow :hidden
      padding:.1rem .6rem .1rem .1rem
      .button-wrapper
        float :left
        width :33.3%
        .button
          padding :.1rem 0
          text-align :center
          margin :.1rem
          border :.02rem solid #ccc
          border-radius :.06rem
    .item-list
      .item
        line-height :.76rem
        padding-left :.2rem

</style>
